.subBox {position: fixed;left: 0;right: 0;top: 0;bottom: 0; 
    max-width: 380px; margin: auto;height: 280px;
    padding: 30px;box-sizing: border-box;box-shadow: 1px 2px 14px #ddd;
    background: #fff;
}
button{border:none;border-radius: 2px;cursor: pointer;}
body{background: #bdbdbd;}
input {width: 200px;}
.btn{padding: 8px 16px;color: #fff;}
.btn-success{background: #28a745;border-color: #28a745;}
.btn-info{background: #6c757d;border-color: #6c757d;}


